Canon Networked Multi-Projection Set Up And Instructions Manual page 22

From Startup to Shutdown
(4) Broadcast Mode
When a single computer is connected to multiple projectors. Useful when
multiple projectors are installed at various positions in an auditorium to project
the same image. (P50)
4
Depending on the mode, you can create, join, or select a projection
session.
5
Click [Start projecting].
Click [Start projecting] on the window to start projection.
6
To stop projection, click [Stop projecting].
7
To return to the mode selection menu, click or
22
in the upper right.